hypochondroplasia

[hī′pō-kŏn′drō-plāzhə]
n.
  1. Congenital dwarfism similar to but milder than achondroplasia, not familial and not evident until mid-childhood, in which the skull and facial features remain normal.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.